I was quite nervous when we first topped up the fitted tank on our Kingham not just here in the UK but once again when we used the separate attachment when abroad. The actual fitting of hose to inlet took time to getting it right but sorted eventually. Can l also add always always wear gloves as the cold blast of escaping gas can cause serious burns and some continental fittings are not always forgiving.@bigguspeckus I'm pleased that you are both ok, but that's quite a scary experience
Your title grabbed my attention as my new van has a built in tank and filling it is probably the only aspect of motorhoming that I have no experience of, leaving me slightly anxious.
Fortunately my dealer is 'first filling' it before handover, so at least there won't be any leaks by the time I get to refill it.